math.statistics: the sample and population mean is the same

Afaik, the mean word works both for population data and for
samples. Which is different from standard deviations, where you have
different formulas for population and sample std.

diff --git a/basis/math/statistics/statistics.factor b/basis/math/statistics/statistics.factor
index 15693f999fd47198dd40b4e40cf81c89d7320301..79bbeb046fbcb0acc3ff9b4b1a657c150fe1c203 100644 (file)
--- a/basis/math/statistics/statistics.factor
+++ b/basis/math/statistics/statistics.factor
@@ -16,9 +16,6 @@ IN: math.statistics
 : mean ( seq -- x )
     0 mean-ddof ; inline
 
-: unbiased-mean ( seq -- x )
-    1 mean-ddof ; inline
-
 : sum-of-squares ( seq -- x )
     [ sq ] map-sum ; inline